Abstract:The paper conducted the hydrothrmal experiment research on the ferrite powders made by the forward and backward feed ways. It examined the particle size distribution, specific surface area and XRD spectral patterns of powders by the different feed ways. Using chemistry and thermodynamics theory made the preliminary analysis and approach on the experiment results. The experiment and theoretic analysis showed that the different feed ways resulted in the different performance of powders. The effect of the ferrite powders made by the backward feed way was superior to that of the ferrite powders made by the forward feed way.